In the binomial system of naming organisms, the second name is called the
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(D)
specific name
2
Which of the following features does not necessarily place paramecium as a higher level of organisation over Amoeba?
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(A)
Presence of cilia
3
The living materials of the cell consist of
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(A)
nucleus and cytoplasm
4
A pupil accidentally "watered" a potted plant with concentrated salt solution after sometime the plant began to wilt.
The wilting of the plant is due to the fact that
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(C)
the salt solution has caused water lost from the plant cell leading to loss of turgor
5
A pupil accidentally "watered" a potted plant with a concentrated salt solution. After sometime the plant began to wilt.
Which of the following activities would revive the plant?
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(D)
Adding more water to the soil
6
Primary growth in plants is brought about by the activity of the
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(A)
meristem
7
To form a ball and socket joint, the structure labeled I fits into another structure in the scapula
called the
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(B)
glenoid cavity
8
The structure labelled II is called
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(C)
shaft
9
Which of the following parts of the skeleton does not have a protective function?
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(B)
Carpals
10
Carbon dioxide is carried in the plasma?
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(A)
in combination with haemoglobin
11
In the adult frog gaseous exchange takes place in the
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(A)
buccal cavity, skin and lungs
12
The process of regulating the amount of water and solutes in the body fluids is called
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(C)
osmoregulation
13
The presence of glucose in the urine of a patent is an indication of malfunctioning of the
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(A)
pancreas
14
Which of the following statements is not true about hormones?
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(D)
Once the effects of hormones are over, they are inactivated and excreted from the body
15
Which of the following actions is note function of adrenaline? It increases
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(B)
muscular power and resistance to fatigue
16
Plant hormones include the following except
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(A)
insulin
17
The passage of nerve impulse across a synapse is facilitated by the secretion of
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(A)
acetylcholine
18
The part of the brain which controls and coordinates body posture is the
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(A)
cerebellum
19
Which of the following processes is not an example of a reflex ac ion?
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(B)
Reading
20
The eyes can properly focus images of objects of various distances on the retina by a process called
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(C)
accommodation
21
The process by which flowers produce fruit without the process of fertilization is called
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(B)
parthenocarpy
22
The part of the young root that pushes its way through the soil is the
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(C)
root cap
23
An example of a dehiscent fruit is
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(A)
crotolaria
24
Which of the following food substances gives the least amount of calories?
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(C)
cabbage
25
Analysis of the gut content of an animal showed that it contained small pieces of bone, seeds. roughages and insects. The animal is likely to be a/an.
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(D)
omnivore
26
Filaments of Spirogyra placed in a beaker of water in a dark cupboard died because
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(A)
the filaments could not photosynthesize
27
The impedance of the concentration of chloroplast in the palisade layer of the leaf is for maximum exposure to
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(B)
light
28
A community is best described as
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(C)
populations of different species living together and interacting with each other in one habitat
29
Which of the following physical actors is likely to affect the distribution of plants in a pond?
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(A)
light
30
Which of the following instruments is used to measure wind speed?
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(D)
Anemometer
31
Tertiary consumers within the web are
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(A)
cat and lion only
32
What would be the effect of taking the lion out of the web?
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(B)
Man would occupy the apex of the web
33
Which of the following statements about the transfer of energy in the ecosystem is correct?
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(D)
Energy is lost at each trophic level
34
Pond weeds normally lack thick layers of cuticle because
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(B)
there is no danger of becoming desiccated
35
Shrubs do not survive on newly weathered soils because
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(A)
the top soil is shallow
36
The speed of the flow of water in a river is faster in the middle than along the banks due to
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(D)
resistance offered by the wall of the banks.
37
The effects of environmental degradation caused by human activities can be controlled by the following measures except
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(C)
resettling indigenous inhabitants
38
The following observations concerning succession are true except that the
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(C)
max community has the greatest number of species
39
A vaccine is introduced into a person‘s body to
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(B)
stimulate the body to produce antibodies
40
Which of the following activities constitutes biological control?
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(C)
Tilapia feeding on the larvae and pupae of mosquito
41
Many diseases caused by bacteria can be treated and cured by using
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(B)
antibiotics
42
To avoid over fishing in a lake, the following measures may be helpful except
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(C)
fishing throughout the year
43
Conservation may be promote by
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(A)
encouraging tree planting
44
Which of the following substances is not recycled in an ecosystem?
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(B)
Energy
45
Which of the following statements about phenylthiocarbamide (PTC) is not correct?
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(D)
Ability to taste the chemical is hot inheritable
46
Which of the following characters is not an example of discontinuous variation?
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(A)
Skin color
47
Which of the following human traits in a class of school children may give an approximate normal distribution curve when the variation is plotted?
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(D)
Heights
48
The observable characteristics of an individual usually resulting from the interaction between the gene composition and the environment is referred to as
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(C)
phenotype
49
The sudden change in a gene structure or chromosome number in an organism likely to cause an inheritable change in the phenotype is known as
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(B)
mutation
50
The effective cells involved in sickle-cell anaemia disease are
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(C)
erythrocytes
51
What does the chemical composition of the genetic material of all living organisms consist of?
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(A)
Deoxyribonucleic acid
52
What of the following occurrences is not a feature of meiosis?
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(D)
Formation of two diploid cell
53
Which of the following diseases is commonly observed in human males and is sex-linked?
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(D)
colour blindness
54
The resemblance of a palatable insect to a poisonous insect is an example of
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(C)
an escape from the predator by mimicry
55
If red is dominant to white and homozygous red pea-plants are crossed with homozygous white pea-plants, the first filial generation will have
